'datetime']; } protected static function booted(): void { static::creating(function (Bill $bill) { if (! $bill->uuid) { $bill->uuid = (string) Str::uuid(); } }); } public function getRouteKeyName(): string { return 'uuid'; } public function patient(): BelongsTo { return $this->belongsTo(Patient::class, 'patient_id'); } public function visit(): BelongsTo { return $this->belongsTo(Visit::class, 'visit_id'); } public function branch(): BelongsTo { return $this->belongsTo(Branch::class, 'branch_id'); } public function organization(): BelongsTo { return $this->belongsTo(Organization::class, 'organization_id'); } public function lineItems(): HasMany { return $this->hasMany(BillLineItem::class, 'bill_id'); } public function payments(): HasMany { return $this->hasMany(Payment::class, 'bill_id'); } }